At last count, there are somewhere between 3,000 and 7,000 Qigong forms. Even for a Qigong Master, that would be a lot to learn.
Fortunately, it is not necessary or even desirable to learn a huge number of forms. The true benefit of Qigong practice is developing a “Qigong State of Mind.” — a feeling of clear minded relaxation that can be induced by the regular practice of just a handful of exercises.
The key to success is learning forms that you really like and wish to practice every day. Practicing with a group once or twice weekly helps you learn some new forms to incorporate into your home practice. Group practice also increases the tremendous health benefits of Qigong, which are magnifed by the energy of a group.